The nominal diameter of Thermo Scientific 4000 Series Duke Standards monosized beads is calibrated with NIST traceable microscopy methods, while the size distribution and uniformity is measured by electrical resistance analysis or optical microscopy.
• Beads with a nominal diameter from 1 μm to 160 μm are made from polystyrene and packaged as aqueous suspensions in 15 mL dropper-tipped bottles in optimum concentrations for easy dispersion, handling and dilution
• Beads with nominal diameters of 200 μm to 650 μm are packaged as dry particles. They are made from polystyrene crosslinked with divinylbenzene. The two largest beads (750 μm and 1000 μm) are polymer products
4000 Series - Monosized Beads
Applications
- Instrument calibration
- Microscopy, light scattering
studies and colloidal
systems research
Specifications:
- Duke Standards
- Nominal Diameter: 1 µm – 1000 μm
- Monosized
Polystyrene microspheres - NIST traceable
suspension - Color: White or Colorless
- Application: Particle size instrument calibration
- Particle Density: 1.05g/cm³
- Refractive Index: 1.59 at 589nm (25©C)
- Shelf Life: Minimum of 24 month.
Beads with nominal diameters of 200 μm to 650 μm are packaged
as dry particles. They are made from polystyrene crosslinked with
divinylbenzene.
